Arachni is a feature-full, modular, high-performance Ruby framework aimed towards helping penetration testers and administrators evaluate the security of web applications. New modules, plug-in support, modular path extractors for the Spider, XMLRPC Client/Server interfaces and probably more stuff I’m currently incapable of recalling. The new XMLRpc services allow for remote and distributed agent-like deployment of Aracheni. The AutoLogin plug-ins enable the framework to log-in to a given web applicationscanning process and ease the hassle of creating and setting your own cookie-jar.
Source: https://thehackernews.com/2010/11/arachni-v021-penetration-testers.html